You'd probably want to use a service like Postmark[1] or Mailgun[2] or Mailnuggets[3] for that as they already exist and are built for that sort of thing. They can handle attachments and the like too. They're simple enough to use depending on what you want to do, although if you just want to use "if email is to [email protected] forward to [email protected]" you could use gmail filters on their own.

[1] http://postmarkapp.com/inbound [2] http://mailgun.com [3] http://mailnuggets.com

Yep - that's a great example of how Tray would be used. Is there a particular CRM / Service you'd like to see integrated? You would be able to forward the whole email or specific parts of an email (ie attachments) as the rule dictates.